CN115159831A - High-aluminum type aluminum silicate fiberboard and preparation method thereof - Google Patents
High-aluminum type aluminum silicate fiberboard and preparation method thereof Download PDFInfo
- Publication number
- CN115159831A CN115159831A CN202210482754.XA CN202210482754A CN115159831A CN 115159831 A CN115159831 A CN 115159831A CN 202210482754 A CN202210482754 A CN 202210482754A CN 115159831 A CN115159831 A CN 115159831A
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- Prior art keywords
- preparing
- drying
- alumina
- silica powder
- aluminum silicate
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Links
- 239000011094 fiberboard Substances 0.000 title claims abstract description 38
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 53
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000835 fiber Substances 0.000 claims abstract description 46
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000002002 slurry Substances 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 24
- 239000005871 repellent Substances 0.000 claims abstract description 23
- 230000002940 repellent Effects 0.000 claims abstract description 23
- 239000000945 filler Substances 0.000 claims abstract description 21
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 18
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 239000007767 bonding agent Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 31
- 239000011230 binding agent Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 21
- 238000004537 pulping Methods 0.000 claims description 19
- 239000002657 fibrous material Substances 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 230000002209 hydrophobic effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 229920001353 Dextrin Polymers 0.000 claims description 3
- 239000004375 Dextrin Substances 0.000 claims description 3
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 3
- 235000019425 dextrin Nutrition 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 3
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 3
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 3
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 235000012211 aluminium silicate Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000003292 glue Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/28—Polysaccharides or derivatives thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention provides a high-alumina type aluminum silicate fiberboard and a preparation method thereof, which are formed by combining high-purity alumina, silica powder, a bonding agent, a filler grade auxiliary agent and a water repellent, and comprise preparation equipment, specifically an electric furnace, injection equipment, a slurry mixing tank, a forming tank, a mold, a drying furnace, a pump and a beater; preparing raw materials: melting high-purity alumina and silica powder by an electric furnace, and then blowing the high-purity alumina and silica powder into flocculent fibers through blowing equipment, wherein the prepared flocculent fibers are used as raw materials of a fiber board, and the raw materials are debugged: adding the flocculent fiber raw materials into a slurry preparation pool, adding a reagent into the slurry preparation pool, melting high-purity alumina and silica powder through a circuit, then making the alumina and silica powder into flocculent fibers through blowing equipment, and processing the flocculent fibers formed by combining the high-purity alumina and the silica powder to ensure that the fiber board has the effect of high aluminum property, thereby ensuring that the fiber board has certain high temperature resistance and toughness.
Description
Technical Field
The invention relates to the technical field of aluminum silicate fiberboards, in particular to a high-aluminum type aluminum silicate fiberboard and a preparation method thereof.
Background
The aluminum silicate fiber board is processed by adopting a wet vacuum forming process, the strength of the product is higher than that of a fiber blanket and a vacuum forming felt, and the aluminum silicate fiber board is suitable for the high-temperature field with the requirement on the rigidity strength of the product.
According to ' an aluminosilicate fiber board and a preparation method thereof ' of patent application No. ' CN201611104616.9', ' the aluminosilicate fiber and water are mixed and stirred to obtain a mixture; mixing and stirring the mixture, the organic binder, the inorganic binder and the glass fiber powder to obtain slurry; and drying the formed slurry to obtain the aluminum silicate fiberboard. The preparation method comprises the following steps of mixing and stirring the alumina silicate fibers, the organic binder, the inorganic binder and the glass fiber powder, preferably putting the alumina silicate fibers into a pulping pool into which water is injected in advance, starting a pulping machine and stirring to obtain a mixture; the stirring time is preferably 10-20 min; the mass ratio of the aluminum silicate fibers to water is preferably (0.5-1.5): 100. mixing and stirring the mixture, the organic binder, the inorganic binder and the glass fiber powder to obtain slurry; the mixing and stirring time is preferably 15 to 25min. The slurry is formed, and the vacuum suction filtration method is preferably adopted in the invention. Drying after molding, wherein the drying temperature is preferably 100-150 ℃; the drying time is preferably 12-24 h ", according to the '201811440967.6' patent application number, a high-density aluminum silicate fiber board and a production method thereof ' ″ the fiber layer is sequentially and continuously sized, excessive glue is removed, and the fiber layer is extruded and formed to form the fiber board in the process of advancing the fiber layer, wherein the sizing of the fiber layer comprises the following steps: placing the fiber layer on a transmission device, uniformly flowing the prepared glue solution to the surface of the fiber layer, penetrating the glue solution through the fiber layer to permeate downwards under the action of gravity, and removing the redundant glue solution comprises the following steps: through the negative pressure effect, make unnecessary glue solution follow deviate from in the fibrous layer to improve the osmotic speed of glue solution, control the intraformational glue solution of fibrous layer reserves, to fibrous layer extrusion includes: -arranging a press member above the transport device, by means of which press member pressure is applied to the fibre plies in order to form the fibre board, by adjusting the distance of the press member to the transport device in order to control the thickness of the fibre plies, further comprising: prior to applying the size to the fiber layer, drawing the fiber batt by negative pressure onto the transfer device to form the fiber layer, further comprising: drying the formed fiberboard, and further comprising: the raw materials for shearing the dried fiberboard comprise 85-90% of aluminum silicate fibers and 10-15% of inorganic binders, wherein the inorganic binders comprise silica sol, aluminum sol, water glass, clay and cement;
in the aluminum silicate board made according to the first and second applications, the fiber material is ordinary aluminum silicate fiber material, and after the aluminum silicate board is made, the aluminum content of the board is low, so that the board has poor high temperature resistance and insufficient toughness when in use, and when in drying, the drying temperature is increased at a high speed, so that the moisture loss of the outer wall of the board is high, part of the moisture in the board is confined by the outer dry surface wall, and further part of the moisture in the board cannot be dried, so that the practicability of the board after being made is affected.
Disclosure of Invention
The invention solves the technical problems that the aluminum content of the aluminum silicate fiber is low, so that the high temperature resistance is poor, the toughness is insufficient and the drying temperature increasing speed is high when the fiber plate is used, thereby causing the practicability of the manufactured plate to be influenced.
The technical scheme of the invention is that the high-alumina type aluminum silicate fiberboard and the preparation method thereof are composed of high-purity alumina, silica powder, a bonding agent, a filler grade auxiliary agent and a water repellent agent, wherein:
70-80 parts of high-purity alumina;
15-20 parts of silica powder;
5 parts of a binding agent;
3 parts of filler grade auxiliary agent;
3 parts of water repellent.
Preferably, the equipment for preparing the high-alumina aluminum silicate fiberboard comprises an electric furnace, a blowing device, a pulp preparing tank, a forming tank, a mold, a drying furnace, a pump and a beater.
Preferably, the method comprises the following steps:
s1, preparing raw materials: melting high-purity alumina and silica powder by an electric furnace, and then blowing the high-purity alumina and silica powder into flocculent fibers by blowing equipment, wherein the flocculent fibers are raw materials of a fiberboard;
s2, raw material debugging: adding the flocculent fiber raw material into a pulp preparing pool, and adding a reagent into the pulp preparing pool;
the types of the reagents are: a binding agent, a filler grade auxiliary agent and a water repellent;
and the addition sequence of the reagents is as follows:
(1) a binder and a filler grade adjuvant;
(2) a water repellent;
s3, preparing slurry: pulping work is carried out in the pulping pool through a pulping machine, the working time of the pulping machine is 15-20min and is divided into two time periods, and the ratio of the two time periods is 7:3, stirring for 7 parts, namely after the binding agent and the filler-grade auxiliary agent are added, stirring for 3 parts, namely after the water repellent is added, and the rotating speed of the beater is 10000-12000r/min;
fully scattering the raw materials and the reagents into slurry by the method;
s4, stirring before entering a mold: transferring the prepared slurry into a forming pool through a pump, and stirring the slurry by using compressed air for 15-20min at the stirring speed of 1200-1500r/m.
S5, entering a mold: the mould is lowered into a forming pool, and the fiber pulp is adsorbed on the mould by utilizing the vacuum-pumping principle;
s6, demolding: carrying out vacuum dehydration on fiber materials containing moisture in the die, carrying out demoulding operation on the dehydrated material plates, and placing the material plates on a tray after demoulding;
s7, drying and processing: the tray containing the material plate is prevented from entering a drying furnace, the drying time is 15-26 hours, the drying step is divided into three intervals, and the drying step specifically comprises the following steps:
(1) drying at 40-50 deg.c for 3-6 hr;
(2) drying at 50-90 deg.c for 4-8 hr;
(3) drying at 90-120 deg.c for 8-12 hr;
s9, heat preservation: the drying furnace is maintained at 30-40 ℃ and the heat preservation time is 12h.
Preferably, the bonding agent is any one of natural rubber, dextrin, pulp waste liquid or starch material.
Preferably, the filler grade auxiliary agent is one of polyvinyl alcohol, hydroxymethyl cellulose or hydroxypropyl cellulose.
Preferably, the water repellent is prepared by mixing a silane group hydrophobic material and a rubber powder group hydrophobic material.
Preferably, the method for stirring the slurry by using compressed air in step S4 specifically comprises: the direction of the compressed air entering the cylinder is changed through the air distribution valve, so that the piston in the cylinder rotates to stir.
Preferably, the specific method of vacuum dehydration in step S6 is: the wet fiber material is conveyed to the vacuum dewatering roll by the conveying device, the vacuum pumping device is started to pump the inside of the vacuum dewatering roll into vacuum, and the dewatering motor is started to drive the vacuum dewatering roll to rotate so as to throw liquid out of the water outlet holes formed in the roll surface.
The invention has the beneficial effects that:
1. the high-purity alumina and the silica powder are melted by a circuit and then are made into flocculent fibers by blowing equipment, and the flocculent fibers formed by combining the high-purity alumina and the silica powder can enable the fiber board to have the effect of high aluminum property after being processed, so that the fiber board has certain high temperature resistance and toughness;
2. carry out the stoving processing of three interval value with the flitch through the drying furnace to make the fibreboard can reach the effect of progressively drying when being dried, its inside moisture can discharge the panel outside fully, and interval stoving can make the moisture that dries by the fire in the stove reach the effect of even dissipation, avoids the interior moisture of stove great and cause the drying efficiency who influences panel, and the heat preservation work after the stoving can make the figure of merit of stable self of panel, increases its self stable performance.
Detailed Description
The invention provides a technical scheme, a high-alumina type aluminum silicate fiberboard and a preparation method thereof, the high-alumina type aluminum silicate fiberboard is formed by combining high-purity alumina, silica powder, a bonding agent, a filler grade auxiliary agent and a water repellent, wherein:
70-80 parts by weight of high-purity alumina;
15-20 parts of silica powder;
5 parts of a binding agent;
3 parts of filler grade auxiliary agent;
3 parts of water repellent.
Specifically, the equipment for preparing the high-alumina aluminum silicate fiberboard comprises an electric furnace, a blowing device, a slurry preparation tank, a forming tank, a mold, a drying furnace, a pump and a beater.
Specifically, the method comprises the following steps:
s1, preparing raw materials: melting high-purity alumina and silica powder by an electric furnace, and then blowing the high-purity alumina and silica powder into flocculent fibers by blowing equipment, wherein the flocculent fibers are raw materials of a fiberboard;
s2, raw material debugging: adding flocculent fiber raw materials into a pulp preparation tank, and adding a reagent into the pulp preparation tank;
the types of the reagents are: a binding agent, a filler grade additive and a water repellent;
and the addition sequence of the reagents is as follows:
(1) a binder and a filler grade adjuvant;
(2) a water repellent;
s3, preparing slurry: pulping work is carried out in the pulping pool through a pulping machine, the working time of the pulping machine is 15-20min and is divided into two time periods, and the ratio of the two time periods is 7:3, the stirring time period with the proportion of 7 is after the binding agent and the filler grade auxiliary agent are added, the stirring time period with the proportion of 3 is after the water repellent is added, and the rotating speed of the beater is 10000-12000r/min;
fully scattering the raw materials and the reagents into slurry by the method;
s4, stirring before mold entering: transferring the prepared slurry into a forming pool through a pump, and stirring the slurry by using compressed air for 15-20min at the stirring speed of 1200-1500r/m.
S5, entering a mold: the mould is lowered into a forming pool, and the fiber pulp is adsorbed on the mould by utilizing the vacuum-pumping principle;
s6, demolding: carrying out vacuum dehydration on fiber materials containing moisture in the die, carrying out demoulding operation on the dehydrated material plates, and placing the material plates on a tray after demoulding;
s7, drying and processing: the tray containing the material plate is prevented from entering the drying furnace, the drying time is 15-26 hours, and the drying step is divided into three intervals, which are specifically as follows:
(1) drying at 40-50 deg.c for 3-6 hr;
(2) drying at 50-90 deg.c for 4-8 hr;
(3) drying at 90-120 deg.c for 8-12 hr;
s9, heat preservation: the drying furnace is maintained at 30-40 ℃ and the heat preservation time is 12h.
Specifically, the binding agent is any one of natural rubber, dextrin, pulp waste liquid or starch material.
Specifically, the filler grade auxiliary agent is one of polyvinyl alcohol, hydroxymethyl cellulose or hydroxypropyl cellulose.
Specifically, the water repellent is prepared by mixing a silane-based hydrophobic material and a rubber powder-based hydrophobic material in equal mass ratio.
Specifically, the method for stirring the slurry by using the compressed air in the step S4 specifically includes: the direction of the compressed air entering the cylinder is changed through the air distribution valve, so that the piston in the cylinder rotates to stir.
Specifically, the vacuum dehydration in step S6 specifically comprises: the wet fiber material is conveyed to the vacuum dewatering roller through the conveying device, the vacuum dewatering roller is hollow inside, water outlet holes are distributed in the surface, a dewatering shell is sleeved on the two outer ends of the vacuum dewatering roller in a coaxial movable mode, a vacuumizing device is installed on the outer side of the dewatering shell, a dewatering motor is movably installed at one end of the vacuum dewatering roller relative to the dewatering shell, the vacuumizing device is started to vacuumize the inside of the vacuum dewatering roller, the dewatering motor is started to drive the vacuum dewatering roller to rotate, liquid is thrown out of the water outlet holes formed in the roller surface to the inside of the dewatering shell, and finally the liquid is discharged through a water outlet formed in the cavity.
The working principle is as follows: preparing raw materials: melting high-purity alumina and silica powder by an electric furnace, and then blowing the high-purity alumina and silica powder into flocculent fibers by blowing equipment, wherein the flocculent fibers are raw materials of a fiberboard;
raw material debugging: adding the flocculent fiber raw material into a pulp preparing pool, and adding a reagent into the pulp preparing pool;
the types of the reagents are: a binding agent, a filler grade additive and a water repellent;
and the addition sequence of the reagents is as follows:
(1) a binding agent and a filler grade auxiliary agent;
(2) a water repellent;
preparing slurry: pulping work is carried out in the pulping pool through a pulping machine, the working time of the pulping machine is 15-20min, the pulping machine is divided into two time periods, and the ratio of the time periods is 7:3, the stirring time period with the proportion of 7 is after the binding agent and the filler grade auxiliary agent are added, the stirring time period with the proportion of 3 is after the water repellent is added, and the rotating speed of the beater is 10000-12000r/min;
fully scattering the raw materials and the reagents into slurry by the method;
the high-purity alumina and the silica powder are melted by a circuit and then are made into flocculent fibers by blowing equipment, and the flocculent fibers formed by combining the high-purity alumina and the silica powder can enable the fiber board to have the effect of high aluminum property after being processed, so that the fiber board has certain high temperature resistance and toughness;
stirring before entering a mold: transferring the prepared slurry into a forming pool through a pump, and stirring the slurry by using compressed air for 15-20min at the stirring speed of 1200-1500r/m;
entering a mold: the mould is lowered into a forming pool, and the fiber pulp is adsorbed on the mould by utilizing the vacuum-pumping principle;
demolding: carrying out vacuum dehydration on the wet fiber material in the mold, carrying out demolding operation on the dehydrated material plate, and placing the material plate subjected to demolding on a tray;
drying and processing: the tray containing the material plate is prevented from entering a drying furnace, the drying time is 15-26 hours, the drying step is divided into three intervals, and the drying step specifically comprises the following steps:
(1) drying at 40-50 deg.c for 3-6 hr;
(2) drying at 50-90 deg.c for 4-8 hr;
(3) and the drying time is 8 to 12 hours at the temperature of between 90 and 120 ℃.
Specifically, heat preservation: maintaining the drying furnace at 30-40 ℃ and keeping the temperature for 12h;
carry out the stoving processing of three interval value with the flitch through the drying furnace to make the fibreboard can reach the effect of progressively drying when being dried, its inside moisture can discharge the panel outside fully, and interval stoving can make the moisture that dries by the fire in the stove reach the effect of even dissipation, avoids the interior moisture of stove great and cause the drying efficiency who influences panel, and the heat preservation work after the stoving can make the figure of merit of stable self of panel, increases its self stable performance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (8)
1. A high aluminium type aluminium silicate fiberboard is characterized in that: the water repellent is prepared by combining high-purity alumina, silica powder, a bonding agent, a filler grade auxiliary agent and a water repellent, wherein:
70-80 parts of high-purity alumina;
15-20 parts of silica powder;
5 parts of a binding agent;
3 parts of filler grade auxiliary agent;
3 parts of water repellent.
2. The method for preparing a high-alumina type aluminum silicate fiberboard according to claim 1, characterized in that: the equipment for preparing the high-alumina type aluminum silicate fiberboard comprises an electric furnace, a blowing device, a slurry mixing tank, a forming tank, a mold, a drying furnace, a pump and a beater.
3. The method for preparing a high-alumina type aluminum silicate fiberboard according to claim 2, wherein the method comprises the following steps: the method comprises the following steps:
s1, preparing raw materials: melting high-purity alumina and silica powder by an electric furnace, and then blowing the high-purity alumina and silica powder into flocculent fibers by blowing equipment, wherein the flocculent fibers are raw materials of a fiberboard;
s2, raw material debugging: adding the flocculent fiber raw material into a pulp preparing pool, and adding a reagent into the pulp preparing pool;
the types of the reagents are: a binding agent, a filler grade auxiliary agent and a water repellent;
and the addition sequence of the reagents is as follows:
(1) a binding agent and a filler grade auxiliary agent;
(2) a water repellent;
s3, preparing slurry: pulping work is carried out in the pulping pool through a pulping machine, the working time of the pulping machine is 15-20min and is divided into two time periods, and the ratio of the two time periods is 7:3, the stirring time period with the proportion of 7 is after the binding agent and the filler grade auxiliary agent are added, the stirring time period with the proportion of 3 is after the water repellent is added, and the rotating speed of the beater is 10000-12000r/min;
fully scattering the raw materials and the reagents into slurry by the method;
s4, stirring before mold entering: transferring the prepared slurry into a forming pool through a pump, and stirring the slurry by using compressed air for 15-20min at the stirring speed of 1200-1500r/m.
S5, entering a mold: the mould is lowered into a forming pool, and the fiber pulp is absorbed on the mould by utilizing the vacuum-pumping principle;
s6, demolding: carrying out vacuum dehydration on fiber materials containing moisture in the die, carrying out demoulding operation on the dehydrated material plates, and placing the material plates on a tray after demoulding;
s7, drying and processing: the tray containing the material plate is prevented from entering a drying furnace, the drying time is 15-26 hours, the drying step is divided into three intervals, and the drying step specifically comprises the following steps:
(1) drying at 40-50 deg.c for 3-6 hr;
(2) drying at 50-90 deg.c for 4-8 hr;
(3) drying at 90-120 deg.c for 8-12 hr;
s9, heat preservation: the drying furnace is maintained at 30-40 ℃ and the heat preservation time is 12h.
4. The method for preparing a high-alumina type aluminum silicate fiberboard according to claim 3, wherein the method comprises the following steps: the binding agent is any one of natural rubber, dextrin, pulp waste liquid or starch material.
5. The method for preparing a high-alumina type aluminum silicate fiberboard according to claim 3, wherein the method comprises the following steps: the filler grade auxiliary agent is one of polyvinyl alcohol, hydroxymethyl cellulose or hydroxypropyl cellulose.
6. The method for preparing a high-alumina type aluminum silicate fiberboard according to claim 3, wherein the method comprises the following steps: the water repellent is prepared by mixing a silane group hydrophobic material and a rubber powder group hydrophobic material.
7. The method for preparing a high-alumina type aluminum silicate fiberboard according to claim 3, wherein the method comprises the following steps: the method for stirring the slurry by using the compressed air in the step S4 specifically comprises the following steps: the direction of the compressed air entering the cylinder is changed through the air distribution valve, so that the piston in the cylinder rotates to stir.
8. The method for preparing a high alumina type aluminum silicate fiber board according to claim 3, wherein: the specific method for vacuum dehydration in step S6 is as follows: the wet fiber material is conveyed to the vacuum dewatering roller by adopting the conveying device, the vacuum pumping device is started to pump the inside of the vacuum dewatering roller into vacuum, and then the dewatering motor is started to drive the vacuum dewatering roller to rotate so as to throw out liquid from the water outlet formed in the roller surface.
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